Grace Tri-Flex XT 48-in x 250-ft 1000-sq ft Synthetic Roof Underlayment

High performance water-shedding underlayment. It's lighter, and stronger than felt - it won't tear away from nails even in high wind Can be left exposed for up to 6 months It's slip-resistant under wet conditions Lighter rolls make the one-person application fast and easy with fewer trips up the ladder Suitable for use under all major roof coverings